Today more than ever, it's important to make sure your computer is running software that protects against malicious software (or malware). Malicious software, which includes viruses, spyware, or other potentially unwanted, software can try to install itself on your computer any time you connect to the Internet.

It can also infect your computer when you install a program using a CD, DVD, or other removable media. Malicious software can also be programmed to run at unexpected times, not just when it is installed.

Microsoft Security Essentials offers three ways to help keep malicious software from infecting your computer:

• Real-time protection: ‍‍ When it detects malicious software, including viruses, spyware, or other potentially unwanted software attempting to install itself or run on your computer, Microsoft Security Essentials alerts you and blocks the software automatically.
• Scanning options: You can use Microsoft Security Essentials to scan for potential threats, such as viruses, spyware, and other potentially unwanted software that might be installed on your computer. You can also use it to schedule scans on a regular basis, and to remove malicious software that is detected during a scan.
• SpyNet community: The online Microsoft SpyNet community helps you see how other people respond to software that has not yet been classified for risks. You can use this information to help you choose whether to allow this software on your computer. In turn, if you participate, your choices are added to the community ratings to help other people decide what to do.

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